diff --git a/cinder/scheduler/evaluator/evaluator.py b/cinder/scheduler/evaluator/evaluator.py
index 435c5b1..ea92795 100644
--- a/cinder/scheduler/evaluator/evaluator.py
+++ b/cinder/scheduler/evaluator/evaluator.py
@@ -236,7 +236,7 @@ def _def_parser():
 
     oneOf = pyparsing.oneOf
     opAssoc = pyparsing.opAssoc
-    operatorPrecedence = pyparsing.operatorPrecedence
+    operatorPrecedence = pyparsing.infixNotation
     Word = pyparsing.Word
 
     integer = Word(nums)